Answers

2015-05-07T20:23:15+05:30
Selling at Rs 153 gives a 10% loss so Rs 153 is 90% of cost.
so cost is 100*153/90=Rs170
To make 20% profit he should have sold it for 120/100*170=Rs204.... 
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2015-05-08T14:20:18+05:30